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Y <br /> Site Assessment and Remediation Feasibility Work Plan <br /> OLYMPIAN- Jimco Truck Plaza <br /> 22502 South Highway 99,Ripon, California <br /> 1.0. INTRODUCTION <br /> At the request of Mr. Rusty Firenze of Olympian Oil,Advanced GeoEnvironmental, Inc. (AGE) has <br /> prepared this work plan for the advancement of two soil borings, installation of ground water <br /> monitoring well, installation of one ground water recovery(extraction) well, ground water sample <br /> collection and analysis and performance of a ground water aquifer pump test at 22502 South <br /> Highway 99 in Ripon, California. Figure 1 shows the general location of the site. Figure 2 shows <br /> details of the site and location of the UST facility. <br /> This Work Plan has been prepared as required by the San Joaquin County Public Health Services - <br /> Environmental Health Division(PHS-EHD)by letter dated 15 May 2001.This work plan is prepared <br /> in accordance with California Regional Water Quality Control Board Central Valley Regional <br /> (CRWQCB-CVR) guidelines for the investigation of underground storage tanks (UST) sites. <br /> The purpose of the proposed work is to continue assessment of the lateral and vertical extent of <br /> dissolved petroleum hydrocarbons in ground water, including methyl tertiary butyl ether(MTBE) <br /> distribution and to assess aquifer response to ground water recovery and feasibility to reduce the <br /> overall dissolved-hydrocarbon mass (MTBE). <br /> Background information,including details of soil excavation and previous site assessment work was <br /> presented in Preliminary Investigation and Evaluation Report, prepared by AGE, dated <br /> 13 December 1999. <br /> 2.0. PROCEDURES <br /> The results of the initial soil and ground water assessment indicated that MTBE was present to a <br /> depth of at least 30 feet below surface grade (bsg) in soil samples. Furthermore,MTBE has been <br /> detected in ground water samples collected from three wells at the site. <br /> This investigation will include of the following tasks: <br /> • Permitting and pre-field work activities; <br /> • Collection and analysis of soil samples and grab ground water samples; <br /> • Installation of ground water monitoring and recovery wells; <br /> • Collection and analysis of ground water samples; <br /> • Performance of a ground water aquifer pump test; and <br /> • Preparation of a report of findings. <br /> Advanced GeoEnvironmental,Inc. <br />